Some tumor cells may produce ________, which defends them from T cell attack.
A. CD8 coreceptors
B. antibodies
C. FAS ligands
D. MHCs that match the tissue of origin
Answer: C
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The three categories of connective tissues are
A) connective tissue proper, fluid connective tissue, and supporting connective tissue. B) epithelial connective tissue, muscle connective tissue, and neural connective tissue. C) glandular connective tissue, exocrine connective tissue, and endocrine connective tissue. D) connective tissue proper, cartilage connective tissue, and bone connective tissue. E) areolar connective tissue, adipose connective tissue, and dense connective tissue.
cAMP acts with the target cell's DNA to carry out the chemical messenger's action
Indicate whether the statement is true or false
Which of the following is not an organic compound?
A. Na2HPO3(H2O)5 B. CH4 C. C16H18N3ClS D. C3H7O2N
The period of time in which cardiac muscle cells are insensitive to further stimulation is called the
A. ectopic focus. B. AV period. C. hyperpolarization period. D. SA period. E. absolute refractory period.